Variable-speed transmission and regulator or brake.



No. 762,055. I RATENTED JUNE 7, 1904.

o., W. & S. RIERA-RD. VARIABLE SPEED TRANSMISSION AND REGULATOR 0RBRAKE.

APPLIOATIO-NTILED APR. 27, A903.

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No. 762,055. PATENTED JUNE-'7, 1904.'

C., W. & S. HIBBARD.

VARIABLE SPEED TRANSMISSION AND REGULATOR 0R BRAKE.

APPLIUATION FILED APR. 27, 1903.

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UNITED STATES Patented June 7, 1904.

PATENT OFFICE.

CHARLES HIBBARD, WARREN HIBBARD, AND SUMNER HIBBARD, OF

' SANDYHILL, NEW YORK.

VARIABLE-SPEED TRANSMISSION-AND REGULATOR OR BRAKE.

SPECIFICATION forming part of Letters Patent No. 762,055, dated June 7,1904.

Application filed April 27, 1903. Serial No. 154,475. [No model.)

To all wil/0m 1li; may concern:

Be it known that we, CHARLES HIBBARD, WARREN HIBBARD, and SUMNERHIBBARD, citizens of the United States, and residents of Sandyhill, inthe county of Washington and State of New York, have invented a new andImproved Variable-Speed Transmission and Regulator or Brake, of whichthe following is a full, clear, and exact description.

rlhe object of the invention is to provide a new and improvedvariable-speed transmission and regulator or brake for use onautomobiles and other machinery, and arranged to insure an easytransmission of the power of the motor to the shaft to be driven withoutshock or jar, to permit the operator to quickly reverse and to use thedevice as a brake, and to enable the operator to vary the speed of thedriven shaft independent of the speed of the motor, and to allowstopping the driven shaft without stopping the motor.

The invention consists of novel features and parts and combinations ofthe same, as will be more fully described hereinafter and then pointedout in the claims.

A practical embodiment of the invention is represented in theaccompanying drawings, forming a part of this specification, in whichsimilar characters of reference indicate corresponding parts in all theviews.

Figure 1 is a sectional side elevation of the improvement. Fig. 2 isasectional plan view of the same on the line 2 2 of Fig. l, and Fig. 3is a sectional side elevation of the controlling-valve in a dierentposition.

The main shaft A of al motor of any approved construction extends into atank B, jiilled with oil or other suitable liquid, and on the saidshaft, within the tank B, are arranged eecentrics O, connected withrocking levers D, fulcrumed on a pin E and pivotally connected withtheplunger-rods F of plungers F, mounted to reciprocate in thepump-cylinders Gr of a multiple pump submerged in the liquid containedin the tank B. As shown in the drawings, three eccentrics and acorresponding number of plungers andl pump-cylinders are used, but it isevident that asingle pump may be used, if desired.

Y The suction-valve H of each pump-cylinder G allows the liquid in thetank to pass into the cylinder on the upstroke of the plunger F, and thedischarge-valve I of each cylinder G allows the liquid forced underpressure out of the cylinder on the downstroke of the plunger F to passinto a connection J, containing a reversing-valve K, from which leadbranch pipes J and J2 'to the casing L of a rotary motor, having apiston L' secured on the shaft N to be driven, the said piston-L beingeccen,

tric in the casing L and provided with piston-heads L2 in contact withthe inner surface of the casing L by the action of springs L3. (ShowninFig. l.) The piston L contacts at its peripheral face with theinterior of the casing L between the branch pipes J J2, so as to form anabutment, and hence when the valve K is in the position shown in Fig. l

and the pumps are in action, then the liquid the arrow ce.

The reversing-valve K is provided on one side with. a eut-out portion K'for establishing connection with either of the branch pipes Jl or J2, asdescribed, and` the other side of lthe valve K is provided with acut-out portion K2, likewise adapted to register wlth either of thebranch pipes J or J2, the said cut-out portion K2 opening at one endinto the tank B, so that the liquid on its return vilovv from the casingL by way of either pipe J2or J 2 flows by the cut-out portion K2 backinto the tank B.

The reversing-valve K is under the control of the operator, and for thispurpose its valvestem K3 extends to the outside of the tank B to bewithin convenient reach of the operator by a suitable handle or leverconnection.

(Not shown.)

In the brauch pipes J and J2 between the reversing-valve K and thecasing L is arranged a controlling-valve O, likewise under the controlof the operator and provided with two ports O and O2 and a transverseby-pass O, of which the ports O and O2 are adapted to connect the endsof the branch pipes J and J 2 with each other for the flow of the liquidto and from the casing L, as above described, and shown in Fig. 1.

Now when the controlling-valve O is given a quarter-turn, as shown inFig. 8, then the ports O and O2 disconnect the ends of the branch pipesJ and J2; but the bypass O3 now connects the ends adjacent to the valveK with each other, so that the liquid forced by the pump through theconnection J fiows past the valve K and the by-pass O"3 back into thetank without Iirst passing to the motorcasing L, so that the piston L isnot actuated, and the piston-heads L2 therein retard the rotation of theshaft N, as the piston-heads now press against the liquid conlined inthe casing L and the ends of the branch pipes J J 2 cut off by thecontrolling-valve O. The latter has its stem O" extending to the outsideof the casing of the tank B to be within convenient reach of theoperator for turning the said valve to the position desired.

It will be understood from the foregoingI that by partly turning thecontrolling-valve O the ports O may be moved partly in register with thebranch pipes and at the same time with the by-pass 03, so that only partof the liquid passes to the motor to act on the piston-heads L2, whilethe remaining part of the liquid flows through the by-.pass O:i andvalve K back into the tank B without doing any work.

From the foregoing it will be seen that the liquid is used over and overagain, and as oil is preferably used it is evident that the variousparts of the device remain well lubricated.

The strokes of the plungers F in the different pump-cylinders (Jr can beregulated at the will of the operator, and for this purpose thepivot-pin E engages blocks D', held slidably in guideways D, formed inthe rocking levers D, as plainly shown in Fig. .Land the said pivot-pinE is held on crank-arms E, secured on a shaft E2, journaled in suitablebearings in the sides of the tank B, as indicated in Fig. 2. On oneouter end of this shaft E2 is secured an arm E3, connected by a link E1or other means with a hand mechanism under the control of the operator,so as to enable the latter to rock the shaft E2 to swing the crankarm Eand its pivot-pin E forward or backward to change the fulcrum of therocking 1evers D, so as to give more or less stroke to the plunger F,but, however, maintaining the same stroke of the eccentrics (l.

From the foregoing it will be seen that when the strokes of the plungersare reduced, for instance, less liquid is pumped and forced to themotor-casiug L, and consequently it takes a longer time for turning thepiston L than when the pumpplung'ers are run at their maximum strokes.Thus the operator can vary the speed of the shaftN to be drivenindependent of the speed of the motor to allow stopping' the shaft N byturning' the controlling-valve O correspondingly without stopping themotor or driven shaft A, and the shaft N can be reversed at any time bythe operator turning the reversing-valve K correspondingly.

It is understood that we do not limit ourselves to the particularconstruction of the pump, motor, or the variable cut-off shown anddescribed, as the said devices may be varied without deviating from thespirit of our invention, and we also do not limit ourselves to theparticular use of the device previously mentioned.

Having thus described our invention, we claim as new and desire tosecure by Letters Patentl. A variable-speed transmitter and regulator,comprising a tank adapted to contain a liquid, adriven shaft extendinginto the tank, a pump submerged in the liquid of the tank, means foroperating the pump from the said shaft, a rotary motor outside of thetank and on the shaft to be driven, pipes leading from the pump outthrough the tank to the motor, a reversing-valve for directing theliquid from the pump to either of said pipes, said valve having acut-out portion leading out through its end for discharging the returnflow of liquid from the motor through either of said pipes into thetank, and a controlling-valve adjacent to the reversing-valve and havingports for connecting the ends of the pipes with each other, and aby-pass for conducting the liquid forced by the pump back into the tankwhen the valve is turned to disconnect the ends of said pipes, as setforth.

2. A speed transmitter and regulator, comprising a tank, a pumpsubmerged in the liquid of the tank, means for operating the pump, arotary motor outside of the tank and connected with the pump by pipes,and a reversing-valve for directing the liquid from the pump to eitherpipe, said valve having a cut-out portion leading out through its end,whereby the return of the liquid from the motor through either of saidpipes will be discharged directly into the tank, as set forth.

3. A speed transmitter and regulator, comprising a tank, a pump in thetank, Ameans for operating the pump, a rotary motor outsideof the tank,pipes connecting the pump with the motor, a reversing-valve fordirectingthe liquid from the pump to either pipe and provided with anopening leading into the tank, and a controlling-valve having ports forconneeting and disconnecting the ends of the said pipes with each other,and a by-pass for connecting the ends of the said pipes with each IOOIIO

other when they have been disconnected by the ports of the valve, as setforth.

4. A powertransmission comprising in combination a tank for containing aliquid, a pump submerged in the liquid, means for actuating the pump, arotary motor driven by the liquid forced by the pump into the motor, thelatter discharging the liquid back into the tank, arevcrsing-valve inthe connection between the pump and motor within the tank, said valvealso permitting the liquid from the motor to be discharged directly intothe tank, and a controlling-valve in the connection between the pump andthe motor, said valve being adjacent to the reversing-valve, and capableof controlling the amount of liquid liowing to the motor, as set forth.

5. A powertransmission comprising in combination a tank for containing aliquid, a pump submerged therein, a rotary motor on the shaft tobedriven, a connection between the pump and the said motor, and areversingvalve in the said connection, within the tank, said valvehaving a cut-out portion leading out through its end, whereby the liquidlmay be made to pass in either direction through the motor and back intothe tank, as set forth` 6. A speed transmitter and regulator, comprisinga tank, a pump in the tank, means for operating the pump, a rotary motoroutside of the tank, pipes leading from the pump out through vthe tankto the motor, a reversingvalve for directing the liquid from the pump toeither of said pipes, said valve being provided with an opening leadinginto the tank for discharging the return Aflow of the liquid from thepipes into the said tank, and a controlling-valve for establishingcommunication through said pipes and connecting the ends thereof whencommunication therethrough is cut oif to permit the liquid forced by thepump to pass through the reversing-valve back into the tank, as setforth. y

7. A speed transmitter and regulator, comprising a tank, a pump lin thetank, means for varying the stroke of the pump, a rotary motor outsideof the tank, pipes leading out through the tank to the motor, aconnection between the said pipes and pump, a rcversing- Y iinto thesaid tank, and a controlling-valve having ports and a by-pass, theformer for connecting and disconnecting the ends of the pipes with cachother, and the latter for connecting the ends lof the said pipes whenthey are disconnected by said ports, as set forth.

8. In a power-transmitter, the combination with a motor, a pump, and aconnection between the pump and motor, of a lever, a fulcrum movable onsaid lever, a crank-arm carrying the fulcrum, means for rocking saidcrank-arm, a connection between one end of the lever and thepump-plunger, and means connected with the other end of said leverforrocking the same, as set forth.

9. In a power-transmitter, the combination with a motor, a pump, and avalved connection between the pump and motor, of a slotted lever, apivot-block mounted to slide in 'theslot of said lever, a crank-armcarrying the pivotblock,means for rocking the crankarm, a connectionbetween one end of the lever and the pump-plunger, and means connectedwith the other end of said lever for rocking the same, as set forth.

1n testimony whereof we have signed our names to this specification inthe presence ofl

